CN203929980U - Local discharge test device - Google Patents
Local discharge test device Download PDFInfo
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- CN203929980U CN203929980U CN201420317583.6U CN201420317583U CN203929980U CN 203929980 U CN203929980 U CN 203929980U CN 201420317583 U CN201420317583 U CN 201420317583U CN 203929980 U CN203929980 U CN 203929980U
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- test cable
- simulation rod
- test
- center conductor
- cable simulation
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- 238000012360 testing method Methods 0.000 title claims abstract description 292
- 238000004088 simulation Methods 0.000 claims abstract description 172
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
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- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- Testing Relating To Insulation (AREA)
Abstract
The utility model provides local discharge test device, it is characterized in that, its structure is: possess to insert and be formed through the bar-shaped of the center pit on shrinkage type insulator (100) (101), the first test cable simulation rod (10) that insert one end, and the second test cable simulation rod (20) of the center pit of shrinkage type insulator is inserted at both ends, the first test cable simulation rod and the second test cable simulation rod all have tubular center's conductor (11 of boring, 21) and be formed on the insulation course (12 of the periphery of described center conductor, 22), the first test cable is simulated excellent center conductor and the second test cable and is simulated excellent center conductor conduction and hollow interior and be connected communicatively.By local discharge test device of the present utility model, can carry out more exactly the partial discharge test of shrinkage type insulator.
Description
Technical field
The utility model relates to a kind of local discharge test device of shrinkage type insulator.
Background technology
In the past, in order to implement insulation to connecting the end of power cable and the middle interconnecting piece of end, carried out the operation in the coated tubular normal temperature shrink sleeve being formed by insulating material of periphery of this middle interconnecting piece.
The center pit forming in described normal temperature shrink sleeve, its diameter is less than the diameter of power cable, power cable is injected after described center pit to the coupling part that just can be close to, not produce the state coverage conductor in space with the periphery of power cable with the convergent force by means of normal temperature shrink sleeve.
At the dispatch from the factory scene of stage or installation exercise of factory, by using power machine etc. cylindric hole enlargement fixture to be inserted in advance to the described center pit of described normal temperature shrink sleeve, power cable is injected to the method that only removes again hole enlargement fixture after hole enlargement fixture, described normal temperature shrink sleeve is installed on power cable.
In addition, for preventing that substandard product from dispatching from the factory, described normal temperature shrink sleeve is carried out to the partial discharge test checking as before dispatching from the factory.
In partial discharge test in the past, that the leading section of a pair of test power cable that splicing ear is installed is made to cone shape, insert from the both sides of the center pit of normal temperature shrink sleeve, therefore the degree of being close to of the outer peripheral face of the inner peripheral surface of described normal temperature shrink sleeve and power cable can be maintained to higher level.
In addition, service test is not used in power cable situation, tests with a pair of test cable simulation rod, and described test cable simulation rod is that the power cable of the described coupling part of simulation formation installation normal temperature shrink sleeve forms., use by solid conductor and a pair of test cable simulation rod that the insulation course being covered in from the position of the front end specified size apart from described conductor described conductor forms and test.The front end of simulating the conductor of a side of rod at described test cable, is provided with the bossed splicing ear of tool, is provided with the splicing ear with the hole chimeric with described projection at opposite side.Simulate excellent splicing ear and be formed as to the part insulation course the cone shape of front reduced from test cable.These test cable simulation rods are inserted from two ends of the center pit of normal temperature shrink sleeve, at the central portion of normal temperature shrink sleeve, splicing ear is combined with splicing ear.Under this state, test cable simulation rod is applied to high voltage, then for example, according to whether detecting the corona from the periphery of normal temperature shrink sleeve checks whether shelf depreciation has occurred (, referring to Patent Document 1).
Prior art document
Patent documentation
[patent documentation 1] Japanese Patent Laid-Open 2003-028912 communique
Utility model content
In described local discharge test device in the past, that the leading section of a pair of test power cable that splicing ear is installed is made to cone shape, insert from the both sides of the center pit of normal temperature shrink sleeve, therefore the degree of being close to of the outer peripheral face of the inner peripheral surface of described normal temperature shrink sleeve and power cable can be maintained to higher level.But, insert power cable or have after the test cable simulation rod of solid conductor with the higher state of degree of being close to, because the air of normal temperature shrink sleeve inside is had nowhere to go, therefore the spaces that meeting generation is caused by air between power cable and normal temperature shrink sleeve etc., this may reduce insulativity.
Its result, causes carrying out exactly the problem of normal temperature shrink sleeve partial discharge test.
The purpose of this utility model is to carry out more exactly the partial discharge test of the shrinkage type insulators such as normal temperature shrink sleeve.
Of the present utility model being characterised in that, its structure is: possess an end and insert the first test cable simulation rod that is formed through the center pit on shrinkage type insulator, and the second test cable simulation rod of the described center pit of described shrinkage type insulator is inserted in two ends, described the first test cable simulation rod all has tubular center's conductor of boring with described the second test cable simulation rod and is formed on the insulation course of the periphery of described center conductor, described the first test cable is simulated excellent center conductor and described the second test cable and is simulated excellent center conductor conduction and hollow interior and be connected communicatively.
In addition,, in described utility model, also can adopt following structure: plural described the second test cable is simulated excellent center conductor conduction and hollow interior and connected communicatively.
In addition, in described utility model, also can adopt following structure: the end at described the first test cable simulation rod arranges convex structure or concavity structure, an end at described the second test cable simulation rod arranges concavity structure or convex structure, by by chimeric to described convex structure and described concavity structure, the described center conductor of described the first test cable simulation rod is connected communicatively with described center conductor conduction and the hollow interior of described the second test cable simulation rod.
In addition,, in described utility model, described convex structure is that cylindrical protrusion, described concavity structure are that embedded hole is also passable.
In addition, in described utility model, also can adopt following a kind of formation: possess the splicing ear with described convex structure and the splicing ear with described concavity structure, there is the splicing ear of described convex structure one end of simulating excellent center conductor at described the first test cable with conduction state tool for mounting or has the splicing ear of described concavity structure, there is the splicing ear of described concavity structure one end of simulating excellent center conductor at described the second test cable with conduction state tool for mounting or has the splicing ear of described convex structure, the splicing ear that has the splicing ear of described convex structure and have a described concavity structure has with described the first test cable simulates the peristome that the hollow interior of the described center conductor of excellent center conductor or described the second test cable simulation rod is communicated with.
In addition,, in described utility model, also can adopt following formation: possess and simulate excellent the other end from described the first test cable and execute alive test terminal part.
In addition,, in described utility model, the external diameter of the insulation course of described the other end of described the first test cable simulation rod is made more greatly also more passable than the external diameter of the insulation course of a described end.
In addition, in described utility model, also can adopt following formation: possess an end and can insert bar-shaped the 3rd test cable simulation rod that is formed through the center pit on shrinkage type insulator, described the 3rd test cable simulation rod has tubular center's conductor of boring and is formed on the insulation course of the periphery of described center conductor, there is the end at described the 3rd test cable simulation rod, described the 3rd test cable is simulated excellent center conductor and described the second test cable and is simulated the structure of the stateful connection that excellent center conductor is communicated with conduction and hollow interior, simulate excellent the other end at described the 3rd test cable and there is the air plenum that nationality is communicated with the hollow interior of described hollow conductor by described insulation course.
In addition, another utility model, it is characterized in that, adopt following structure: possess an end and insert the first test cable simulation rod being formed through in the center pit of shrinkage type insulator, and one end insert the 3rd test cable simulation rod of the described center pit of described shrinkage type insulator, described the first test cable simulation rod all has tubular center's conductor of boring with described the 3rd test cable simulation rod and is formed at the insulation course of the periphery of described center conductor, described the first test cable is simulated excellent center conductor and described the 3rd test cable and is simulated excellent center conductor conduction and hollow interior and be connected communicatively, simulate excellent the other end at described the 3rd test cable and there is the air plenum that nationality is communicated with the hollow interior of described hollow conductor by described insulation course.
In addition, the external diameter of the insulation course of described the other end of the 3rd test cable simulation rod is arranged to more greatly also more passable than the external diameter of the insulation course of a described end.
In the utility model, first and second test cable simulation rod that inserts the center pit of shrinkage type insulator possesses tubular center's conductor, the situation that first and second test cable simulation rod is inserted from the both sides of the center pit of shrinkage type insulator, air in space is between the two admitted to first and second test cable and simulates the hollow interior of excellent center conductor, inhibition air enters test cable and simulates between excellent outer peripheral face and the inner peripheral surface of shrinkage type insulator and generation space, thereby can carry out more exactly partial discharge test.
In addition, in the utility model, adopt in the situation of following structure, be that plural described the second test cable is simulated in the situation that excellent center conductor conducts electricity and hollow interior is connected communicatively, can be by more than one the second test cable simulation rod by series connection spreading then, by configure new shrinkage type insulator between the second test cable simulation rod and the second test cable simulation rod, can carry out partial discharge test to more shrinkage type insulator.
In addition, in the utility model, in the situation that nationality is connected first and second test cable simulation rod with concavity structure by for example cylindrical protrusion convex structure such with embedded hole, by each test cable simulation rod being inserted to the center pit of shrinkage type insulator, then the method being directly pressed into, just can be by the electrical connection of each test cable simulation rod, thus can be fast and carry out like a cork the preparation work of minor insulation test.
In addition, utilization has the splicing ear and the splicing ear with concavity structure of convex structure, in the situation that first and second test cable simulation rod is connected, even if test cable simulation rod is to be made up of tubular center's conductor and insulation course, also can guarantee to be like a cork in contact with one another the area of part, thereby two center conductors more suitably can be electrically connected.
In addition, the first test cable is simulated to the external diameter of the insulation course of excellent the other end and be arranged to than in the larger situation of the external diameter of the insulation course of an end, test cable can be simulated to excellent the other end and maintain higher level with the insulativity of testing the part being connected with terminal part.
In addition, in the situation that the 3rd test cable simulation rod arranges air plenum, the end of center conductor can be wrapped in insulation course and externally not open wide, thereby can fully guarantee its insulativity.And, nationality is by air plenum, can fully guarantee the volume in the first to the 3rd test cable simulation rod, therefore in the time connecting the first to the 3rd test cable simulation rod, air in mutual space can be contained in to inside, also can fully reduce the generation of simulating space between excellent outer peripheral face and the inner peripheral surface of shrinkage type insulator at the first to the 3rd test cable.
In addition, by being simulated to excellent air plenum, the 3rd test cable is arranged at the other end, the external diameter of the insulation course of its periphery is arranged to larger than the periphery of an end, the volume of air plenum can be further expanded, the first to the 3rd test cable can be more effectively suppressed at and simulated the generation in space between excellent outer peripheral face and the inner peripheral surface of shrinkage type insulator.
In addition, simulated in another utility model of bar construction with the 3rd test cable by the first test cable simulation rod, in the situation that the 3rd test cable simulation rod is provided with air plenum, the end of center conductor can be wrapped in insulation course and externally not open wide, can fully guarantee its insulativity.And, nationality is by air plenum, can fully guarantee the first and the 3rd volume in test cable simulation rod, therefore in the time of connection first and the 3rd test cable simulation rod, air in space each other can be contained in to inside, also can fully reduce first and the 3rd test cable simulate the generation in space between excellent outer peripheral face and the inner peripheral surface of shrinkage type insulator.
In addition, by being simulated to excellent air plenum, the 3rd test cable is arranged at the other end, the insulation course external diameter of its periphery is arranged to larger than the periphery of an end, the volume of air plenum can be further expanded, the first to the 3rd test cable can be more effectively suppressed at and simulated the generation in space between excellent outer peripheral face and the inner peripheral surface of shrinkage type insulator.
Brief description of the drawings
Fig. 1 cuts each position of the local discharge test device of normal temperature shrink sleeve open overall pie graph while seeing.
Fig. 2 is that the first test cable is simulated excellent sectional view.
Fig. 3 is that the second test cable is simulated excellent sectional view.
Fig. 4 is that the 3rd test cable is simulated excellent sectional view.
Fig. 5 is the side view of two splicing ears in connection status.
Fig. 6 is the sectional view of two splicing ears in released state.
Fig. 7 is the sectional view that represents the initial state of the assembling of local discharge test device.
Fig. 8 represents the immediately sectional view of the assembled state of Fig. 7 local discharge test device afterwards.
Fig. 9 represents the immediately sectional view of the assembled state of Fig. 8 local discharge test device afterwards.
Figure 10 represents the immediately sectional view of the assembled state of Fig. 9 local discharge test device afterwards.
Figure 11 represents the immediately sectional view of the assembled state of Figure 10 local discharge test device afterwards.
Figure 12 is the sectional view that represents other examples of local discharge test device.
Label declaration
1 local discharge test device
10, the 20,30 first to the 3rd test cable simulation rod
11,21,31 center conductors
12,22,32 insulation courses
37 air plenums
40 test terminal parts
50 pick-up units
60,70 splicing ears
61 embedded holes (concavity structure, peristome)
63 intercommunicating pores (peristome)
66 vent ports
71 projections (convex structure)
73 intercommunicating pores (peristome)
100 normal temperature shrink sleeve (shrinkage type insulator)
101 center pits
102 insulation courses
103 inner semi-conductive layers
104 external semi-conductive layers
Embodiment
[summary of the embodiment of utility model]
According to Fig. 1～Figure 11, embodiment of the present utility model is described.
The present embodiment relates to a kind of local discharge test device of normal temperature shrink sleeve, and described normal temperature shrink sleeve is to cover to be installed on the shrinkage type insulator that the middle interconnecting piece of power cable insulate to it.
[normal temperature shrink sleeve]
As shown in Figure 1, normal temperature shrink sleeve 100 possess be formed with the tubular insulation course 102 of center pit 101, on the inner peripheral surface of insulation course 102, the inside semi-conductive layer 103 that forms of length direction centre position and the external semi-conductive layer 104 forming to cover the mode of whole outer peripheral face of insulation course 102.
Described insulation course 102 forms by having the insulativity materials such as the silicon rubber, EP rubbers, neoprene of caoutchouc elasticity under normal temperature, and two end is the diminishing shape of diameter.
Inner semi-conductive layer 103 and external semi-conductive layer 104 form by adding the semi-conductive rubber that carbon black forms in described insulativity material.And insulation course 102, inner semi-conductive layer 103 and external semi-conductive layer 104 are formed in one.
In addition, on the inner peripheral surface of the insulation course 102 of normal temperature shrink sleeve 100, that length direction end positions arranges stress cone layer is also passable.
The internal diameter of the center pit 101 of described normal temperature shrink sleeve 100 is set for less than the external diameter of power cable and middle interconnecting piece, when described normal temperature shrink sleeve 100 is arranged on middle interconnecting piece, in advance cylindric hole enlargement fixture (diagram is omitted) is inserted to center pit 101, carry out hole enlargement.When the interior rear flank that power cable and middle interconnecting piece are inserted to described hole enlargement fixture, when removing hole enlargement fixture, normal temperature shrink sleeve 100 is shunk, in the state of being close to the outer peripheral face of power cable and middle interconnecting piece.
While normal temperature shrink sleeve 100 being carried out to partial discharge test with the local discharge test device 1 that will illustrate below, without using described hole enlargement fixture.
[local discharge test device]
Local discharge test device 1 is for checking that in advance whether the described normal temperature shrink sleeve 100 that is arranged on middle interconnecting piece at any one occurs electric discharge, causes insulativity to reduce.
Local discharge test device 1 possesses the first to the 3rd test cable simulation rod 10,20,30 and test terminal part 40.
The first to the 3rd test cable simulation excellent 10,20,30 is can insert the center pit 101 of normal temperature shrink sleeve 100 bar-shaped, can connect and be electrically connected.
The the first test cable simulation rod 10 that is positioned at a side end of the union body of the first to the 3rd test cable simulation rod 10,20,30 being connected is connected with described test terminal part 40.
In addition, as two normal temperature shrink sleeve 100,100 of subjects, be disposed at respectively first and second test cable simulation rod 10,20 connecting portion periphery and second with the periphery of the connecting portion of the 3rd test cable simulation excellent 20,30, be provided with the pick-up unit 50,50 that described normal temperature shrink sleeve 100,100 is carried out separately to Partial Discharge Detection.
While test, described first, second test cable simulation rod 10,20 inserts from the different ends of the center pit 101 of normal temperature shrink sleeve 100 respectively.In addition, second, third test cable simulation rod 20,30 is also that insert the different ends from the center pit 101 of normal temperature shrink sleeve 100 respectively.
[test terminal part]
Test with terminal part 40 mainly by be applied in voltage conductor 41, support conductor 41 sleeve pipe 42, be arranged at the first test cable simulation excellent 10 at the center, inner side of inserting sleeve pipe 42 periphery stress cone 43 and these are contained in to inner casing 44.
In the inner side of sleeve pipe 42, the center conductor 11 (will narrate below) of the first test cable simulation rod 10 is situated between and is electrically connected by splicing ear 70 and conductor 41.In addition,, in sleeve pipe 42, around the connecting portion of splicing ear 70 and conductor 41, envelope has insulating oil.
In addition, described casing 44 has impermeability, and in inside, envelope has insulating gas.
[the first test cable simulation rod]
The first test cable simulation rod 10 is the conductor for being connected with terminal part 40 with test.For described the first test cable simulation rod 10, the end (right part in Fig. 1) of inserting normal temperature shrink sleeve 100 1 sides is called to " end ", is called " the other end " with test with the end (left part of Fig. 1) that terminal part 40 is connected a side.
As shown in the sectional view of Fig. 2, described the first test cable simulation rod 10 is mainly made up of the insulation course being made up of epoxy resin 12 that is positioned at the center conductor 11 at center and is formed at the periphery of described center conductor 10.
Center conductor 11 is that for example, its inside is hollow by the tubing of the section circle of good conductor (copper) formation, and two open-ended, in whole length, connects.
Be arranged in order to the other end and be formed with minor diameter part 15, central diameter portion 14, large-diameter portion 13 from an end of insulation course 12, diameter progressively expands.The large-diameter portion 13 of the other end one side inserts tests the center pit 101 that inserts normal temperature shrink sleeve 100 with the minor diameter part 15 of terminal part 40, one end one sides.In addition, the external diameter of minor diameter part 15 is more bigger than the internal diameter of the center pit of normal temperature shrink sleeve 100 101, and when insertion, the inner peripheral surface tight of the center pit 101 of the outer peripheral face of minor diameter part 15 and normal temperature shrink sleeve 100 ground is close to.
In addition, center conductor 11 is slightly outstanding from two ends of insulation course 12, and the outstanding end of the both sides of heart conductor 11 will be installed respectively the splicing ear 60,70 that will narrate below in these.In addition, in end one side of the first test cable simulation rod 10, splicing ear 60 is installed, in the other end, one side is installed splicing ear 70.
The center conductor 11 of the first test cable simulation rod 10 is hollow in whole length, while therefore the minor diameter part of insulation course 12 15 being inserted to the center pit 101 of normal temperature shrink sleeve 100, the air of center pit 101 inside can be sent into the inside of center conductor 11.
[the second test cable simulation rod]
As shown in the sectional view of Fig. 3, the second test cable simulation rod 20 is mainly made up of the insulation course being made up of epoxy resin 22 that is positioned at the center conductor 21 at center and is formed at the periphery of described center conductor.
The same with center conductor 11, center conductor 21 is also two tubing open-ended, that connect in whole length, that be made up of good conductor.
For described the second test cable simulation rod 20, to be called " end " with the first test cable simulation rod 10 ends (left part of Fig. 1) that are connected a side, be called " the other end " with the 3rd test cable simulation rod 30 ends (right part of Fig. 1) that are connected a side.
One end of insulation course 22 and the other end are minor diameter part 23,23, and centre is central diameter portion 24.The external diameter of minor diameter part 23,23 is set for the minor diameter part 15 of the first test cable simulation rod 10 and is equated, the external diameter of central diameter portion 24 is set for the central diameter portion 14 of the first test cable simulation rod 10 and equated.
And each minor diameter part 23,23 inserts respectively the center pit 101,101 of normal temperature shrink sleeve 100,100.
In addition, two ends of center conductor 21 are outstanding from two ends of insulation course 22, and splicing ear 60,70 is installed, and this point is identical with the first test cable simulation rod 10.In addition, in end one side of the second test cable simulation rod 20, splicing ear 70 is installed, in the other end, one side is installed splicing ear 60.
In addition, center conductor 21 connects in whole length, and in the time inserting normal temperature shrink sleeve 100, its hollow interior becomes air housing region, and this point is identical with the first test cable simulation rod 10.
[the 3rd test cable simulation rod]
In the first to the 3rd test cable simulation rod 10,20,30 of series connection, the 3rd test cable simulation rod 30 is configured in and tests a side contrary with terminal part 40 (apart from test terminal part 40 side farthest).For described the 3rd test cable simulation rod 30, the end (left part of Fig. 1) of inserting normal temperature shrink sleeve 100 1 sides is called to " end ", the end of a contrary side (right part of Fig. 1) is called to " the other end ".
As shown in the sectional view of Fig. 4, the 3rd test cable simulation rod 30 is mainly made up of the insulation course being made up of epoxy resin 32 that is positioned at the center conductor 31 at center and is formed at the periphery of described center conductor 31.
The same with center conductor 11, center conductor 31 is also two tubing open-ended, that connect in whole length, that be made up of good conductor.Just, center conductor 31 be to be communicated with the air plenum 37 that will narrate below with test with the end of the contrary side of terminal part 40, completely cut off with outside.
Be arranged in order to the other end and be formed with minor diameter part 33, central diameter portion 34, large-diameter portion 35 from an end of insulation course 32, between central diameter portion 34 and large-diameter portion 35, be formed with the tapered portion 36 that diameter expands gradually.
The external diameter of minor diameter part 33 is set for the minor diameter part 15 of the first test cable simulation rod 10 and is equated, the external diameter of central diameter portion 34 is set for the central diameter portion 14 of the first test cable simulation rod 10 and equated.
And minor diameter part 33 inserts the center pit 101 of normal temperature shrink sleeve 100.
In addition, the center conductor 31 of described the 3rd test cable simulation rod 30 only has an end outstanding from an end of insulation course 32, in described outstanding end, splicing ear 60 will be installed.
And the other end of center conductor 31 is communicated with the air plenum 37 that the tapered portion 36 of another end one side at insulation course 32 and the inside of large-diameter portion 35 form.37 of described air plenums are communicated with outside by center conductor 31.In addition, the internal diameter of described air plenum 37 is almost larger than the external diameter of center conductor 31 in whole length at it, makes internal capacity slightly expand some.
The center conductor 31 of the 3rd test cable simulation rod 30 connects in whole length, therefore the minor diameter part of insulation course 32 33 is inserted in the situation of center pit 101 of normal temperature shrink sleeve 100, its inner air can be guided to air plenum 37 by the inside of center conductor 31.
[splicing ear]
The described first to the 3rd test cable simulation rod 10,20,30 is situated between by splicing ear 60,70 physical connection and connected in electrical series.
As shown in Figures 5 and 6, all roughly columned blocks for for example, being formed by good conductor (copper) of splicing ear 60,70.The center of the block on an end face of the splicing ear 60 of a side, be formed with as concavity structure, circle has the embedded hole 61 at the end.In addition,, at the opposing end surface of the splicing ear 70 of opposite side, on the center line of block, be formed with the cylindrical protrusion 71 as convex structure.Then,, by projection 71 is inserted to embedded hole 61, just splicing ear 60 can be connected with 70.
The splicing ear 60 of one side is equipped on an end (with the end of the second test cable simulation rod 20 link one sides) of described the first test cable simulation rod 10 and the other end (with the end of the 3rd test cable simulation rod 30 link one sides) of the second test cable simulation rod 20.
On the end face of the contrary side of the end face with being formed with embedded hole 61 of described splicing ear 60, be formed with the patchhole 62 of the center conductor 11 or 21 of the first or second test cable simulation rod 10,20 in the center of block.Described patchhole 62 has the end, concentric with embedded hole 61, and nationality, by the intercommunicating pore 63 that connects each bottom surface, is formed with air duct each other.That is, splicing ear 60 is being equipped under the state of the first or second test cable simulation rod 10,20 to the hollow interior that air can be from the end-face flow of the leading section of splicing ear 60 to center conductor 11 or 21., embedded hole 61 and intercommunicating pore 63 play the effect of the peristome being communicated with the hollow interior of test cable simulation rod 10,20.
In addition, be formed with from the outer peripheral face of splicing ear 60 and connect the screw hole 64 to patchhole 62 at the four sides of patchhole 62.Be screwed into not shown grub screw from described screw hole 64, the leading section of the center conductor 11 or 21 of insertion patchhole 62 is fastening fixing from four sides.
In addition, the embedded hole 61 of splicing ear 60 be formed with end face one side be cone shape enlarged-diameter tapered portion 65, the front end of the projection of splicing ear 70 71 easily can be guided to embedded hole 61.
In addition, be formed with from the outer peripheral face of splicing ear 60 and connect near the vent port 66 bottom of described embedded hole 61 at splicing ear 60.In the time that the both sides of the first to the 3rd test cable simulation rod 10,20,30 center pits 101 from normal temperature shrink sleeve 100 that are equipped with splicing ear 60 or 70 states are inserted, be clipped in air in the space in the middle of their and be situated between and be discharged from from the center conductor 11～31 of each test cable simulation rod 10,20,30 by each splicing ear 60,70.But, in the time that the projection 71 of splicing ear 70 is inserted the embedded hole 61 of splicing ear 60, the air in the space between each splicing ear 60,70 is had nowhere to go, thereby may enter between the outer peripheral face of splicing ear 60,70 and the inner peripheral surface of normal temperature shrink sleeve 100, forms space.Even if in this case, also can be situated between and by vent port 66, splicing ear 60,70 ambient airs be guided to inside and avoid the generation in space.
Splicing ear 70 is equipped on an end (with the end of the second test cable simulation rod 20 link one sides) of the other end (ends of terminal part 40 1 sides are used in test) of described the first test cable simulation rod 10, an end of the second test cable simulation rod 20 (with the end of the first test cable simulation rod 10 link one sides) and the 3rd test cable simulation rod 30.
The center of the block on the end face of the contrary side of the end face with being formed with projection 71 of described splicing ear 70, is formed with the patchhole 72 of the center conductor 11,21,31 of the first～three test cable simulation rod 10,20,30.Described patchhole 72 is concentric and have the end with projection 71, is formed with through projection 71 center connects the intercommunicating pore 73 as peristome to leading section always in the bottom of patchhole 72.That is, be equipped under the state of the first～three test cable simulation rod 10,20,30 at splicing ear 70, air can be passed to from the leading section of the projection of splicing ear 70 71 hollow interior of center conductor 11,21 or 31.
In addition, be provided with screw hole 74 at the four sides of patchhole 72, with grub screw, the leading section of center conductor 11,21 or 31 fixed, this point is identical with the situation of splicing ear 60.
In addition, the projection 71 of splicing ear 70 is formed with the tapered portion 75 that is cone shape enlarged-diameter at its root, by chimeric with the tapered portion 65 of described splicing ear 60.Like this, just, can reduce the void space producing between splicing ear 60,70 in the time connecting.
[pick-up unit]
Pick-up unit 50 possesses the metal forming being made up of good conductors such as aluminium 51 of the whole outer peripheral face that covers normal temperature shrink sleeve 100, by the wire 52 of metal forming 51 ground connection and carry out the current detector 53 of current detecting midway at wire 52.
Described pick-up unit 50, be applied with the high voltage of regulation on each test cable simulation rod 10,20,30 time, if there is electric discharge in any one part in normal temperature shrink sleeve 100, in wire 52, can flow through and exceed a certain amount of electric current, by detecting this electric current with current detector 53, just can check whether shelf depreciation occurs.
In addition, in two normal temperature shrink sleeve 100,100, be provided with separately pick-up unit 50, therefore can whether have to each normal temperature shrink sleeve 100,100 individual inspiration the generation of shelf depreciation.
[assembling of local discharge test device]
According to the order of Fig. 7～Figure 11, the assembling of local discharge test device 1 is described.
First, as shown in Figure 7, simulate an end and the other end of the center conductor 11 of rod 10 at the first test cable splicing ear 60,70 is installed, at the outer peripheral face of insulation course 12, stress cone 43 is set.Then, be situated between, by splicing ear 70, the first test cable simulation rod 10 be connected to test with on the conductor 41 of terminal part 40.
Then, as shown in Figure 8, the end of splicing ear 60 1 sides of the first test cable simulation rod 10 is inserted from an end of the center pit 101 of normal temperature shrink sleeve 100.Now, the splicing ear 60 of the first test cable simulation rod 10 is inserted into always to the position of the inner side of inner semi-conductive layer 103.
Next, as shown in Figure 9, simulate the other end and an end of the center conductor 21 of rod 20 at the second test cable splicing ear 60,70 is installed, the end of splicing ear 70 1 sides is inserted from another end of the center pit 101 of first normal temperature shrink sleeve 100.Now, the splicing ear 70 of the second test cable simulation rod 20 is inserted into the position of the inner side of inner semi-conductive layer 103, and then further, is connected with the splicing ear 60 of the first test cable simulation rod 10.
In the time that above-mentioned the second test cable simulation rod 20 is inserted to the center pit 101 of normal temperature shrink sleeve 100, two ends of center pit 101 inside are connected terminal 60 and 70 sealings.And the air in center pit 101 is situated between and is flowed into the hollow interior of center conductor 11 by the embedded hole 61 of splicing ear 60 and intercommunicating pore 63, and Jie is flowed into the hollow interior (with reference to Fig. 6) of center conductor 21 by the intercommunicating pore 73 of splicing ear 70.
Then, in the time that the projection of splicing ear 70 71 is inserted to the embedded hole 61 of splicing ear 60, embedded hole 61 is sealed by projection 71, but the air membership of having nowhere to go is directed in embedded hole 61 by vent port 66, therefore the air of having nowhere to go can be guided to the hollow interior of the center conductor 11,21 of each test cable simulation rod 10,20 between splicing ear 60 and splicing ear 70.
Then, as shown in figure 10, the end of splicing ear 60 1 sides of the second test cable simulation rod 20 is inserted from an end of the center pit 101 of second normal temperature shrink sleeve 100.Now, also the splicing ear 60 of the second test cable simulation rod 20 is inserted into the position of the inner side of inner semi-conductive layer 103.
Then, as shown in figure 11, in an end of the center conductor 31 of the 3rd test cable simulation rod 30, splicing ear 70 is installed, is inserted from another end of the center pit 101 of second normal temperature shrink sleeve 100.Now, the splicing ear 70 of the 3rd test cable simulation rod 30 is inserted into the position of the inner side of inner semi-conductive layer 103, and then further, is connected with the splicing ear 60 of the second test cable simulation rod 20.
Now, the air between splicing ear 60,70 flows into the hollow interior of the center conductor 21,31 of each test cable simulation rod 20,30.The center conductor 31 of the 3rd test cable simulation rod 30 is communicated with air plenum 37, the internal capacity of each center conductor 11,21,31 and the internal capacity of air plenum 37 of the first to the 3rd test cable simulation rod 10,20,30 are fully ensured, therefore the air between splicing ear 60,70 all can be included in these spaces.
Under this state, two ends of each normal temperature shrink sleeve 100,100 lay respectively at the stage portion position of first to the 3rd minor diameter part 15,23,33 of test cable simulation rod 10,20,30 and the boundary of central diameter portion 14,24,34.
Then, be wound around covering metal paper tinsel 51 at the outer peripheral face of each normal temperature shrink sleeve 100,100, by wire 52 by described metal forming 51 ground connection.Then, current detector 53 is set on wire 52, thereby has assembled the local discharge test device 1 (with reference to figure 1) that two normal temperature shrink sleeve 100,100 are tested.
Described local discharge test device 1, utilize test terminal part 40 to apply to the first to the 3rd test cable simulation rod 10,20,30 high voltage that Preset Time specifies, and use current detector 53 to detect the current value on wire 52, then according to the current value of circulation be whether certain value with on judge in normal temperature shrink sleeve 100, whether to have occurred shelf depreciation.
[technique effect of local discharge test device]
The center conductor 11,21,31 of each test cable simulation rod 10～30 of described local discharge test device 1 is made into hollow, therefore insert the situation of test cable simulation rod 10,20 or 30 from the both sides of the center pit 101 of normal temperature shrink sleeve 100, the air in center pit 101 can be sent into the hollow interior of center conductor 11,21 or 31.Therefore, can suppress air and enter between the outer peripheral face of test cable simulation rod 10～30 and the inner peripheral surface of the center pit 101 of normal temperature shrink sleeve 100 and formation space, thereby can carry out more exactly partial discharge test.
In addition, because the external diameter of part and the external diameter of splicing ear 60,70 of the center pit 101 of the insertion normal temperature shrink sleeve 100 of each test cable simulation rod 10～30 are all more even, therefore by making the external diameter of being convenient to insert normal temperature shrink sleeve 100, can not use power machine just can be pressed into, the preparation work of testing.
In addition,, although 10～30 uses of each test cable simulation rod is tubular center's conductor 11,21,31, cross-sectional area is less, be difficult to two center conductors directly to connect, but because being is situated between to be connected by splicing ear 60,70, therefore can fully guarantee contact area, electrical connection property is also better.
In addition, because each test cable simulation rod 10～30 center possesses center conductor 11,21,31, possess insulation course 12,22,32 in its periphery, therefore can under the state approaching at the practical service environment with power cable is equipped on to normal temperature shrink sleeve 100 in the situation that, carry out partial discharge test.
In addition,, because the second test cable simulation rod 20 in the middle of being positioned at has splicing ear 60,70 in both sides, therefore can easily set up described the second test cable simulation rod 20.; by multiple the second test cable simulation rods 20 are connected; connect the method for the first test cable simulation rod 10 and the 3rd test cable simulation rod 30 in two end; just can increase test cable simulation rod and simulate the quantity of excellent linking part with test cable, therefore more shrink sleeve 100 can be installed.And, can once carry out partial discharge test to multiple normal temperature shrink sleeve 100 like this.
Especially, because two of the second test cable simulation rod 20 are open-ended, can make the hollow interior of the center conductor 11,21,31 of the hollow interior of center conductor 21 and other test cable simulation rods 10,20,30 of both sides be communicated with, therefore the hollow inner space of each test cable simulation rod 10～30 all can be communicated with.And, can form so the larger space that can hold more air, can maintain higher level by being suppressed at the effect that produces space between the outer peripheral face of test cable simulation rod 10～30 and the inner peripheral surface of the center pit 101 of normal temperature shrink sleeve 100.
After partial discharge test finishes, when test cable simulation rod 10,20,30 is extracted from normal temperature shrink sleeve 100, air can flow between test cable simulation rod 10,20,30 and normal temperature shrink sleeve 100 from the hollow interior of test cable simulation rod 10,20,30, therefore can reduce the pull cable simulation rod resistance of 10,20,30 o'clock.
[other]
Although part on the first to the 3rd test cable simulation rod 10,20,30, that insert the center pit 101 of normal temperature shrink sleeve 100 comprises that splicing ear 60,70 is being all equal diameter, but for example also can adopt including splicing ear 60,70, make by inserting end the shape expanding gradually towards rearward end diameter.In this situation, preferably the external diameter of the leading section of the splicing ear of diameter minimum 60 or 70 is made identical or more bigger than it with the internal diameter of center pit 101.
So just, can improve the degree of being close between the inner peripheral surface of center pit 101 of normal temperature shrink sleeve 100 and the outer peripheral face of splicing ear 60,70 and each test cable simulation rod 10,20,30, air is effectively sent into hollow interior, further reduce the generation in space.
In addition, in described embodiment, although use three test cable simulation rods 10,20,30, as shown in figure 12, also can only use first and the 3rd test cable simulation rod 10,30, only a normal temperature shrink sleeve 100 be carried out to partial discharge test.
In addition, because the center pit of normal temperature shrink sleeve 100 can be inserted respectively in two ends of the second test cable simulation rod 20, therefore connected the method for the other end of another one the second test cable simulation rod 20 by splicing ear 70,60 by being situated between in an end of the second test cable simulation rod 20, just can set up multiple the second test cable simulation rods 20 with the state of series connection.In addition, by insert the method for splicing ear 70,60 in centre, the quantity of the second test cable simulation rod 20 can be increased to more than two.Like this, also configure normal temperature shrink sleeve 100 by the coupling part between the second test cable simulation rod 20 and the second test cable simulation rod 20, and the method for equipping pick-up unit 50 in each normal temperature shrink sleeve 100, can carry out partial discharge test to more normal temperature shrink sleeve 100.
In addition, the center conductor 11,21,31 of each test cable simulation rod 10,20,30 and the material of insulation course 12,22,32 are an example, are not limited to described material.Center conductor 11,21,31 is good conductor, and insulation course 12,22,32 is insulating material.
In addition, although be that splicing ear 60 is arranged to the first test cable simulation rod 10 before, splicing ear 70 is arranged at the second test cable simulation rod 20, and interconnected, but also splicing ear 70 can be arranged to the first test cable simulation rod 10, splicing ear 60 is arranged at the second test cable simulation rod 20, and is interconnected.Also be like this to the second test cable simulation rod 20 and the 3rd test cable simulation rod 30.
Claims (10)
1. a local discharge test device, it is characterized in that, its structure is: possess an end and insert the first test cable simulation rod that is formed through the center pit on shrinkage type insulator, and the second test cable simulation rod of the described center pit of described shrinkage type insulator is inserted in two ends, described the first test cable simulation rod all has tubular center's conductor of boring with described the second test cable simulation rod and is formed on the insulation course of the periphery of described center conductor, described the first test cable is simulated excellent center conductor and described the second test cable and is simulated excellent center conductor conduction and hollow interior and be connected communicatively.
2. local discharge test device as claimed in claim 1, is characterized in that, its structure is: plural described the second test cable is simulated excellent center conductor conduction and hollow interior and connected communicatively.
3. local discharge test device as claimed in claim 1, it is characterized in that, its structure is: the end at described the first test cable simulation rod arranges convex structure or concavity structure, an end at described the second test cable simulation rod arranges concavity structure or convex structure, by by chimeric to described convex structure and described concavity structure, the described center conductor of described the first test cable simulation rod is connected communicatively with described center conductor conduction and the hollow interior of described the second test cable simulation rod.
4. local discharge test device as claimed in claim 3, is characterized in that, described convex structure is cylindrical protrusion, and described concavity structure is embedded hole.
5. local discharge test device as claimed in claim 3, is characterized in that, possesses the splicing ear with described convex structure and the splicing ear with described concavity structure,
There is the splicing ear of described convex structure one end of simulating excellent center conductor at described the first test cable with the state tool for mounting of conduction or has the splicing ear of described concavity structure, there is the splicing ear of described concavity structure one end of simulating excellent center conductor at described the second test cable with the state tool for mounting of conduction or has the splicing ear of described convex structure, and the splicing ear that has the splicing ear of described convex structure and have a described concavity structure has with described the first test cable simulates the peristome that the hollow interior of the described center conductor of excellent center conductor or described the second test cable simulation rod is communicated with.
6. local discharge test device as claimed in claim 1, is characterized in that, possesses to simulate excellent the other end from described the first test cable and execute alive test terminal part.
7. local discharge test device as claimed in claim 6, is characterized in that, the external diameter of the insulation course of described the other end of described the first test cable simulation rod is larger than the external diameter of the insulation course of a described end.
8. local discharge test device as claimed in claim 6, it is characterized in that, its structure is: possess an end and insert the 3rd test cable simulation rod that is formed through the center pit on shrinkage type insulator, described the 3rd test cable simulation rod has tubular center's conductor of boring and is formed on the insulation course of the periphery of described center conductor, described the 3rd test cable is simulated excellent center conductor and described the second test cable and is simulated excellent center conductor conduction and hollow interior and be connected communicatively, wherein, simulate excellent the other end at described the 3rd test cable and there is the air plenum that nationality is communicated with the hollow interior of described hollow conductor by described insulation course.
9. a local discharge test device, it is characterized in that, its structure is: possess an end and insert the first test cable simulation rod that is formed through the center pit on shrinkage type insulator, and one end insert the 3rd test cable simulation rod of the described center pit of described shrinkage type insulator, described the first test cable simulation rod all has tubular center's conductor of boring with described the 3rd test cable simulation rod and is formed on the insulation course of the periphery of described center conductor, described the first test cable is simulated excellent center conductor and described the 3rd test cable and is simulated excellent center conductor conduction and hollow interior and be connected communicatively, wherein, simulate excellent the other end at described the 3rd test cable and there is the air plenum that nationality is communicated with the hollow interior of described hollow conductor by described insulation course.
10. local discharge test device as claimed in claim 8 or 9, is characterized in that, the external diameter of the insulation course of described the other end of described the 3rd test cable simulation rod is larger than the external diameter of the insulation course of a described end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420317583.6U CN203929980U (en) | 2014-06-13 | 2014-06-13 | Local discharge test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420317583.6U CN203929980U (en) | 2014-06-13 | 2014-06-13 | Local discharge test device |
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| CN203929980U true CN203929980U (en) | 2014-11-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110754025A (en) * | 2017-06-20 | 2020-02-04 | 三菱电机株式会社 | Electric equipment connecting device and opening and closing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110754025A (en) * | 2017-06-20 | 2020-02-04 | 三菱电机株式会社 | Electric equipment connecting device and opening and closing device |
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Granted publication date: 20141105 |